Comparing the National Early Warning Score and the Manchester Triage System in Emergency Department Triage: A...

Area of Science:

• Emergency Medicine
• Clinical Triage Systems
• Patient Risk Stratification

Background:

• Emergency department (ED) triage systems prioritize patients by clinical severity.
• The National Early Warning Score (NEWS) is a proposed alternative to traditional systems like the Manchester Triage System (MTS).
• The comparative efficacy of NEWS and MTS across various clinical outcomes requires further investigation.

Purpose of the Study:

• To compare the predictive performance of the NEWS and MTS in an emergency department setting.
• To evaluate the accuracy of both systems in predicting mortality, hospitalization, ICU admission, and need for life-saving interventions.
• To determine the most effective triage system for prioritizing high-risk patients.

Main Methods:

• Retrospective, single-center study of 27,238 adult ED patients over 13 months.
• Comparison of NEWS and MTS performance using Receiver Operating Characteristic (ROC) curves and area under the ROC curve (AUROC).
• Decision Curve Analysis (DCA) assessed clinical utility across relevant probability thresholds.

Main Results:

• NEWS showed higher accuracy for 30-day mortality (AUROC 0.745 vs. 0.701).
• MTS significantly outperformed NEWS for hospitalization (0.733 vs. 0.609), ICU admission (0.862 vs. 0.672), and secondary outcomes.
• DCA confirmed MTS superiority for clinically relevant ED probability thresholds (20-40%).

Conclusions:

• NEWS is effective for mortality prediction but insufficient for comprehensive ED triage.
• MTS demonstrates superior performance in prioritizing high-risk patients based on clinical severity.
• Focus should be on refining existing triage systems; multi-center prospective studies are recommended.